import tensorflow as tf

state = tf.Variable(0,name='counter')
print(state.name)

one = tf.constant(1)

new_value = tf.add(state,one)

update =  tf.assign(state,new_value)

init = tf.initialize_all_variables()

with tf.Session()  as sess:
    sess.run(init)
    for _  in  range(3):
        sess.run(update)
        print(sess.run(state))
